[1]刘慎坦,王国芳,谢祥峰,等.不同基质对人工湿地脱氮效果和硝化及反硝化细菌分布的影响[J].东南大学学报(自然科学版),2011,41(2):400-405.[doi:10.3969/j.issn.1001-0505.2011.02.035]
　Liu Shentan,Wang Guofang,Xie Xiangfeng,et al.Effect of matrix on denitrification efficiency and distribution of nitrifying and denitrifying bacteria in constructed wetlands[J].Journal of Southeast University (Natural Science Edition),2011,41(2):400-405.[doi:10.3969/j.issn.1001-0505.2011.02.035]
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不同基质对人工湿地脱氮效果和硝化及反硝化细菌分布的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第2期
页码:
400-405
栏目:
环境科学与工程
出版日期:
2011-03-20

文章信息/Info

Title:
Effect of matrix on denitrification efficiency and distribution of nitrifying and denitrifying bacteria in constructed wetlands
作者:
刘慎坦1; 王国芳1; 谢祥峰1; 吴磊1; 李先宁1; 2
(1东南大学能源与环境学院,南京210096)
(2东南大学环境医学工程教育部重点实验室,南京210096)
Author(s):
Liu Shentan1; Wang Guofang1; Xie Xiangfeng1; Wu Lei1; Li Xianning1; 2
(1School of Energy and Environment, Southest University, Nanjing 210096, China)
(2Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, Southeast University, Nanjing 210096, China)
关键词:
人工湿地; 基质; 硝化细菌; 反硝化细菌
Keywords:
constructed wetland;  matrix;  nitrifying bacteria;  denitrifying bacteria
分类号:
X703
DOI:
10.3969/j.issn.1001-0505.2011.02.035
摘要:
对组合基质和煤渣基质潜流式人工湿地的脱氮效果进行了对比研究,结果表明:组合基质人工湿地的脱氮效果较好,氨氮和总氮的平均去除率达到81.9%和75.7%,而煤渣基质人工湿地的去除率相对较低,氨氮和总氮的平均去除率仅为59.6%和51.8%.为进一步探讨2组人工湿地脱氮效果差异显著的原因,研究了不同基质潜流式人工湿地系统内硝化细菌和反硝化细菌的空间分布.实验结果表明:基质类型对人工湿地中硝化细菌和反硝化细菌的数量和空间分布有较大影响; 在上层,组合基质人工湿地硝化细菌数是煤渣基质人工湿地的2.8倍,在下层,反硝化细菌数是煤渣基质人工湿地的1.8倍.人工湿地表层溶解氧水平较高,硝化细菌密度大,底层溶解氧水平较低,反硝化细菌密度大,使得湿地中形成上层以硝化菌为主的硝化反应区和下层以反硝化菌为主的反硝化区.
Abstract:
A comparative study on nitrogen removal in subsurface constructed wetlands with combination matrix and coal matrix was conducted. The results indicate that the removal efficiency of nitrogen in the combination matrix constructed wetland is higher. The average removal rate of ammonia nitrogen and total nitrogen reach 81. 9% and 75. 7%. While in the coal matrix constructed wetland, the removal efficiency of nitrogen is comparatively lower, and the average removal rate of ammonia nitrogen and total nitrogen reach only 59. 6% and 51. 8%. To further investigate the cause of the significant difference of nitrogen removal efficiency of two groups of artificial wetlands, the spatial distribution of nitrifying bacteria and denitrifying bacteria was studied. The experimental results show that the number and the spatial distribution of nitrifying bacteria and denitrifying bacteria are influenced by the type of the matrix used in the wetlands. In the upper layer, the number of nitrifying bacteria of the combination matrix constructed wetland is 2. 8 times larger than the coal matrix constructed wetland, while in the lower layer the denitrifying bacteria was 1. 8 times larger. The density of nitrifying bacteria in the upper layer is high due to high dissolved oxygen and the density of denitrifying bacteria in the lower layer is high due to low dissolved oxygen, which result in nitrification area in the upper layer and denitrification area in the lower layer.

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备注/Memo

备注/Memo:
作者简介:刘慎坦(1984—),男,博士生;李先宁(联系人),男,博士,教授,博士生导师,lxn@seu.edu.cn.
基金项目:江苏省自然科学基金资助项目(BK2008322)、江苏省科技支撑计划资助项目(BE2008408).
引文格式: 刘慎坦,王国芳,谢祥峰,等.不同基质对人工湿地脱氮效果和硝化及反硝化细菌分布的影响[J].东南大学学报:自然科学版,2011,41(2):400-405.[doi:10.3969/j.issn.1001-0505.2011.02.035]
更新日期/Last Update: 2011-03-20